Water marks on the frame (upvc) will come off using a trade solvent cleaner or a cream cleaner (such as the one you use on the fascias/soffits).
We allways wet the frames first and then clean the frames with the cleaner and then wash again,making sure to scrub the glass and frames to get the dry residue from the cream cleaner off.Then we use wfp to clean them all thoroughly and they should be sparkling...
We allways clean scuff marks off doors and treads on every regular visit...this way the customer knows what they can expect when you clean the rest of the frames.
Price wise....well i guess you can roughly calculate how long it will take you to do the job and then work on your hourly rate although we tend to book a job in for a whole day and charge accordingly.